挑战习题
1/5单选题
难度:

1.下列算式正确的是()
A3+(-2)+(+2)=1
B 4+(-6)+3=(-6)+4+3
C[5+(-2)]+4=(5+4)+2
D
提示1:
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正确答案:Qg==
QS7plJnor6/jgILljp/lvI89M+OAgkIu5bqU55So5Lqk5o2i5b6L44CCQy7oi6XlupTnlKjnu5PlkIjlvovvvIzlupTkuLpbNSvvvIgtMu+8iV0rND3vvIg1KzTvvIktMuOAgkQu6Iul5bqU55So57uT5ZCI5b6L77yM5bqU5Li6PGltZyB3aWR0aD0yNDggaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMjMvckJBQ0UxVElvV3ZDZ1l3WUFBQUR5TXdvcGFRMzAwLnBuZyI+